Update repoman, make image a bit smaller.

repoman.Dockerfile

@@ -5,8 +5,8 @@ FROM gentoo/portage:latest as portage
 FROM gentoo/stage3-amd64:latest as build
 COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo
 ENV MAKEOPTS "-j1"
-ENV USE "minimal -cracklib -curl -gpg -idn -ncurses -net -nls"
-ENV USE "${USE} -pam -pcre -perl -readline -rsync-verify -ssl -webdav"
+ENV USE "minimal -cracklib -curl -gpg -idn -ncurses -net -nls \
+    -pam -pcre -pcre-jit -perl -readline -rsync-verify -ssl -webdav"
 ENV FEATURES "-ipc-sandbox -network-sandbox -pid-sandbox -sandbox -usersandbox"
 RUN eselect profile set default/linux/amd64/17.1/no-multilib
 RUN emerge --root=/workdir --quiet app-portage/repoman dev-vcs/git
@@ -18,6 +18,8 @@ RUN emerge --root=/workdir --rage-clean --quiet \
     net-misc/rsync \
     sys-apps/file \
     sys-apps/sed
+RUN rm -r /workdir/usr/share/{doc,gtk-doc,i18n,locale,man,zoneinfo}
+RUN rm -r /workdir/usr/include
 
 # Final image.
 FROM gentoo/portage:latest